eugene yokotaandDream 1d77704ea3 [2.0.x] feat: Add dependencyMode setting to control classpath transitivity (#8960) (#8972)
**Problem**
sbt always includes all transitive dependencies on the classpath.
This makes it easy to accidentally depend on transitive dependencies
without declaring them, leading to fragile builds that break when
a library changes its own dependencies.

**Solution**
Add a `dependencyMode` setting with three modes:

- DependencyMode.Transitive (default) — current behavior, all
  transitive dependencies on the classpath
- DependencyMode.Direct — only declared dependencies plus
  scala-library on the classpath
- DependencyMode.PlusOne — declared dependencies plus their
  immediate transitive dependencies plus scala-library

Fixes sbt/sbt#8942

Co-authored-by: Dream <[email protected]>
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2023-06-20 16:39:07 +02:00

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